apache 2.4.26 has a major regression. Upstream bug report is here: https://bz.apache.org/bugzilla/show_bug.cgi?id=61202 And there's a lengthy discussion on apache's "dev" mailing list[1]. This breaks common web applications (e.g. wordpress) in fpm setups. Thus this should be considered major. As 2.4.26 fixes a couple of security bugs this is a bit problematic, but I suggest waiting for an upstream fix before stabilizing 2.4.26. [1] https://lists.apache.org/thread.html/3cc85e29c730e85b2ec0090aa2f27b8b244c2e503e0afae2901ef08d@%3Cdev.httpd.apache.org%3E
Upstream fix: https://svn.apache.org/viewvc?view=revision&revision=1800306
Should be fixed in apache-2.4.27